Derek Peng

SWE Intern @ Doppel

Software Engineer at Doppel. EECS at UC Berkeley.

Studying EECS at UC Berkeley on a Regents Scholarship. I care about making ML systems harder to fool, shipping products with real users and real constraints, and security tooling that teams actually run in production. At Doppel, I work on alert routing interpretability and DNS tooling for 150+ enterprises. With Prof. Nidhi Rastogi at AI4Sec Lab, I researched concept-based defenses against adversarial patch attacks. I also founded my high school's first RoboSub AUV team and competed at CyberPatriot nationals.

Focus areas
  • Security
  • AI Safety
  • Threat Intelligence
  • Adversarial ML

// Work

Selected projects across research, security, and product — with case studies where there's enough depth to go deeper.

Platform2026

tash.cards

Institutional-grade trading card exchange with Supabase Realtime price feeds, Stripe Connect KYC settlement, and an AI intake pipeline using Gemini Vision and PSA's API to onboard graded cards instantly.

250+Listed Cards

// Experience

Software Engineering Intern·Doppel
May 2026 — Now

Social engineering defense platform used by Robinhood, Coinbase, OpenAI, and more. Shipped alert routing interpretability to 150+ enterprises and rebuilt DNS tooling recovering ~3,500 false positives yearly.

Research Intern·AI4Sec Lab
Apr — Dec 2025

With Prof. Nidhi Rastogi. Concept-based masking for adversarial patch defense — accepted at NeurIPS 2025 Reliable ML workshop.

Solo Engineer·tash.cards
Feb — May 2026

Built trading card exchange end-to-end: $22k+ volume, 710+ trades, Stripe Connect settlement, Gemini Vision + PSA API intake.